diff options
| author | Daniel Kurtz <djkurtz@chromium.org> | 2011-07-06 22:39:14 -0700 |
|---|---|---|
| committer | Dmitry Torokhov <dmitry.torokhov@gmail.com> | 2011-07-06 23:01:09 -0700 |
| commit | a9f0b79edfda3750d254ba5b192795e2554c361d (patch) | |
| tree | c7fac3d08d6a031dd6fa356eb68c28c00d4367a6 | |
| parent | 8be3c650f54c259694e82282e54b12c14304487e (diff) | |
Input: synaptics - fuzz position for touchpad with reduced filtering
Synaptics touchpads indicate via a capability bit when they perform reduced
filtering on position data. In such a case, use a non-zero fuzz value.
Fuzz = 8 was chosen empirically by observing the raw position data
reported by a clickpad indicating it had reduced filtering.
Signed-off-by: Daniel Kurtz <djkurtz@chromium.org>
Acked-by: Chase Douglas <chase.douglas@canonical.com>
Signed-off-by: Dmitry Torokhov <dtor@mail.ru>
| -rw-r--r-- | drivers/input/mouse/synaptics.c | 15 | ||||
| -rw-r--r-- | drivers/input/mouse/synaptics.h | 10 |
2 files changed, 15 insertions, 10 deletions
diff --git a/drivers/input/mouse/synaptics.c b/drivers/input/mouse/synaptics.c index 477d1eaea8b..363aedf8131 100644 --- a/drivers/input/mouse/synaptics.c +++ b/drivers/input/mouse/synaptics.c @@ -684,23 +684,25 @@ static psmouse_ret_t synaptics_process_byte(struct psmouse *psmouse) static void set_input_params(struct input_dev *dev, struct synaptics_data *priv) { int i; + int fuzz = SYN_CAP_REDUCED_FILTERING(priv->ext_cap_0c) ? + SYN_REDUCED_FILTER_FUZZ : 0; __set_bit(INPUT_PROP_POINTER, dev->propbit); __set_bit(EV_ABS, dev->evbit); - input_set_abs_params(dev, ABS_X, - XMIN_NOMINAL, priv->x_max ?: XMAX_NOMINAL, 0, 0); - input_set_abs_params(dev, ABS_Y, - YMIN_NOMINAL, priv->y_max ?: YMAX_NOMINAL, 0, 0); + input_set_abs_params(dev, ABS_X, XMIN_NOMINAL, + priv->x_max ?: XMAX_NOMINAL, fuzz, 0); + input_set_abs_params(dev, ABS_Y, YMIN_NOMINAL, + priv->y_max ?: YMAX_NOMINAL, fuzz, 0); input_set_abs_params(dev, ABS_PRESSURE, 0, 255, 0, 0); if (SYN_CAP_ADV_GESTURE(priv->ext_cap_0c)) { __set_bit(INPUT_PROP_SEMI_MT, dev->propbit); input_mt_init_slots(dev, 2); input_set_abs_params(dev, ABS_MT_POSITION_X, XMIN_NOMINAL, - priv->x_max ?: XMAX_NOMINAL, 0, 0); + priv->x_max ?: XMAX_NOMINAL, fuzz, 0); input_set_abs_params(dev, ABS_MT_POSITION_Y, YMIN_NOMINAL, - priv->y_max ?: YMAX_NOMINAL, 0, 0); + priv->y_max ?: YMAX_NOMINAL, fuzz, 0); input_abs_set_res(dev, ABS_MT_POSITION_X, priv->x_res); input_abs_set_res(dev, ABS_MT_POSITION_Y, priv->y_res); @@ -974,4 +976,3 @@ bool synaptics_supported(void) } #endif /* CONFIG_MOUSE_PS2_SYNAPTICS */ - diff --git a/drivers/input/mouse/synaptics.h b/drivers/input/mouse/synaptics.h index 7453938bf5e..b8025b0ee2b 100644 --- a/drivers/input/mouse/synaptics.h +++ b/drivers/input/mouse/synaptics.h @@ -66,9 +66,9 @@ * 1 0x60 multifinger mode identifies firmware finger counting * (not reporting!) algorithm. * Not particularly meaningful - * 1 0x80 covered pad W clipped to 14, 15 == pad mostly covered - * 2 0x01 clickpad bit 1 2-button ClickPad - * 2 0x02 deluxe LED controls touchpad support LED commands + * 1 0x80 covered pad W clipped to 14, 15 == pad mostly covered + * 2 0x01 clickpad bit 1 2-button ClickPad + * 2 0x02 deluxe LED controls touchpad support LED commands * ala multimedia control bar * 2 0x04 reduced filtering firmware does less filtering on * position data, driver should watch @@ -78,6 +78,7 @@ #define SYN_CAP_CLICKPAD2BTN(ex0c) ((ex0c) & 0x000100) /* 2-button ClickPad */ #define SYN_CAP_MAX_DIMENSIONS(ex0c) ((ex0c) & 0x020000) #define SYN_CAP_ADV_GESTURE(ex0c) ((ex0c) & 0x080000) +#define SYN_CAP_REDUCED_FILTERING(ex0c) ((ex0c) & 0x000400) /* synaptics modes query bits */ #define SYN_MODE_ABSOLUTE(m) ((m) & (1 << 7)) @@ -104,6 +105,9 @@ #define SYN_NEWABS_RELAXED 2 #define SYN_OLDABS 3 +/* amount to fuzz position data when touchpad reports reduced filtering */ +#define SYN_REDUCED_FILTER_FUZZ 8 + /* * A structure to describe the state of the touchpad hardware (buttons and pad) */ |